<!DOCTYPE html>
<html lang="en" ng-app>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            height: 200px;
            width: 200px;
            border: 1px solid darkred;
        }
    </style>
    <script src="angular.min.js"></script>
</head>
<body>

<input type="text"  ng-model="a">
<select name="123" ng-model="a">
    <option value="1">shanghai</option>
    <option value="2">shenzhen</option>
    <option value="3">beijing</option>
</select>

</body>
<script>

</script>
</html>